Loads

What is it, where did it come from, and how is it used?

A spring Wisconsin snowstorm demonstrates how a building design practice may lead to higher risk.

An unusual design project gives this CM international exposure.

Getting information up front on sprinkler systems can ease the design process.

Finding opportunity in the growing solar panel market.

An unusual project with an uncommon shape presented the kind of design challenge truss technicians don’t see every day.
 

A little forethought can prevent the potential overstress that occurs when deflection leads to rooftop ponding.

A best practice for building designers: find a friend to check your load paths.

Lumber Design Values

No matter the species, component manufacturers (CMs) purchase and rely on the accuracy and reliability of many different lumber design properties, including: bending (Fb); shear parallel to grain (Fv), compression perpendicular to grain (Fc^), compression parallel to grain (Fc), tension parallel to grain (Ft), and modulus of elasticity (E and Emin).

Question: 

The Corps' guide spec for wood construction requires the drawings to indicate the design forces on each truss member for the worst loading condition. Loading conditions, of course, can include wind, snow build up, and unbalanced loading, to name a few. Many A/E firms submit drawings lacking these member forces, but instead show typical loading conditions. What does the wood truss fabricator want to see – truss diagrams with maximum loads on each member? Or would he prefer to design the truss from many required loading diagrams?